Pipe-coupling.



No. 687,917. Patented Dec. 3, I90I.

P. J. DERVIN.

PIPE CUUPLING.

(Application led Apr. 4, 1901.)

(No Model.) 2 Sheets-Sheet l.

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N0. 687,9I7. Patented Dec. 3, l90l. P; J. DERVIN.

PIPE GUUPLING.

(Application led Apr. 4, 1901.)

(No Model.) 2 Sheets-Sheet 2.

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UNITED @rares PATRICK J. DERVIN,

OF NEW YORK, N. Y.

PlPEu-COUPLING.

, SPECIFICATION formingpart of Letters Pat-ent No. 687,917, dated December 3, 1901. Application filed April 4, 1901. Serial No. 54,248. (No model.)

T0 tu whom, it may concern:

Be it known that I, PATRICK J. DERvIN, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Pipe-Couplings, of which the following is a full and complete specification, such as will enable those skilled in the art to which it appertains to make and use the same.

This invention relates to coupling devices for lead pipes; and the object thereof is to provide improved devices of this class by means of which the ends of lead pipes may be quickly, easily, and securely connected.

The invention is fully disclosed in the following specification, of which the accompanying drawings form a part, in which the separate parts of my improvement are designated by the same reference characters in each of the views, and in which-- Figure 1 is a side view of a lead-pipe coupling made according to my invention; Fig. 2, a longitudinal section thereof; Fig. 3, an end view; Fig. 4, a longitudinal section of one part of the couplinggFigs. 5, 6, 7, 8, and 9, detail views of other parts of the coupling, and Fig. 10 a section of a collar` or ring which forms a part of said coupling.

In the drawings forming part of this speciication I have shown at 5 two lead pipes, and inthe practice of my invention I provide a tube 11, having beveled or conical ends 11a and provided near one end with an annular rib or iiange 11b, and the opposite end of which is screw-threaded, as shown at 11, and -provided with a screw-threaded collar or ring 11d, having spanner-holes 11e, by which it may be screwed onto the tube 11. I also provide metal sleeves 12, one of which is mounted on each of the tubes 5, and these sleeves are larger at their adjacent than at their outer ends to correspond with the beveled or conical ends of the tube 11, and the adjacent ends of said sleeves are screwsthreaded, as shown at 12a, and said sleeves are connected by a central tube or sleeve 13, having a thickened central portion, and the central bore of the ends of which is enlarged, as shown at 13, whereby annular shoulders 13b are formed in said sleeve or tube.

In practice the adjacent ends of the lead tubes 5 are expanded, as shown at 5, and

this may be done by any suitable instrument, and the beveled or conical ends of the central tube 1l are inserted thereinto. The sleeves l2 are then moved up onto the enlarged portion of said tubes 5', as shown in Fig. 2, and the tube or sleeve is moved on from the righthand end of the coupling and screwed onto the left-hand sleeve 12, after which the ring or collar 11d is screwed into position, as shown in said figure, and the right-hand sleeve 12 is then screwed into the end of the sleeve or tube 13. The sleeve or tube 13 may be first placed in position on the tube 11 and the sleeves 12 may be screwed thereinto, and said sleeve or tube 13 and the sleeves 12 are each provided with angular surfaces 14:,whereby a wrench may be applied thereto.

By means of this construction I provide a coupling for lead pipes whereby the pipes may be securely connected at all times and whereby the coupling will not reduce the strength of the pipes, and it will be apparent that any desired material may be used for the inner tube l1 of the coupling, and a coupling of this class may thus be made to serve for the connection of lead pipes through which acids and other substances of this class are passed.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A coupling for lead pipes, consisting of an inner tube, the ends of which are beveled and adapted to be inserted into the ends of the pipes which are correspondingly enlarged, said tube being provided near one end with Van annular collar or flange, and near the other end with a detachable collar or ring, an outer sleeve or tube placed on the inner tube and held in place by said collar or ring, and end sleeves which are adapted to be mounted on the tubes and the adjacent ends of which are enlarged, said end sleeves being adapted to be screwed into the ends of the outer tube or sleeve, substantially as shown and described.

2. A coupling for lead pipes, comprising a tube 11 the ends of which are beveled or conical, said tube being provided near one end with a iiange l1 and near the opposite end with a detachable screw-threaded collar or IOO In Jtestimony that I claim the foregoing as io i my invention I have signed my name, in presence of the subscribing witnesses, this 1st day of April, 1901.

PATRICK J. DERVIN.

IVitnesses:

F. A. STEWART, F. F. FELLER. 

